[R-sig-ME] within_and_between_group_variance

Ben Bolker bbo|ker @end|ng |rom gm@||@com
Tue Sep 10 18:01:35 CEST 2019

  Can we have a little more context for the question please? Utility
for what purpose?

  GLMs (generalized linear models) don't have grouping structure at
all, so the terms "within-group" and "between-group" don't really

  (G)LMMs summarize "among-group variance" as the variances of the
random effects. "Within-group variance" is the residual variance for a
linear mixed model (LMM, i.e. a GLMM with Gaussian response and
identity link), harder to compute for non-LMM GLMMs (but papers e.g.
by Nakagawa and Schielzeth define these components on the way to
estimating R^2 or intra-class correlation values for GLMMs).

On Tue, Sep 10, 2019 at 11:57 AM C. AMAL D. GLELE <altessedac2 using gmail.com> wrote:
> Hello, dear all.
> Can somebody,  please, tell me:
> among the outputs of a glmm and/or glm, what are:
> 1) within group variance and it's utility
> 2) between group variance and it's utility
> In advance, many thanks.
> Best regards,
>         [[alternative HTML version deleted]]
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